<html>
<body>
<a :action='get_userid'>hoge</a>

<a href='http://www.yahoo.com'>yahoo</a>

<a href='mailto:arai@example.com'>mail</a>

<a href='tel:03-1234-5678'>tel</a>

<form :action='bar' method='GET'>
hoge
</form>
</body>
</html>
